<template>
  <div class="app-container">
    <!--查询表单-->
    <el-card class="operate-container" shadow="never">
      <el-form :inline="true" class="demo-form-inline">
      <el-form-item label="名称">
        <el-input v-model="searchObj.name" placeholder="讲师名" /> 
      </el-form-item>

      <el-form-item label="头衔">
        <el-select v-model="searchObj.level" clearable placeholder="头衔">
          <el-option value="1" label="高级讲师"/>
          <el-option value="0" label="首席讲师"/>
        </el-select>
      </el-form-item>

      <el-form-item label="入驻时间">
        <el-date-picker
          v-model="searchObj.joinDateBegin"
          placeholder="开始时间"
          value-format="yyyy-MM-dd" />
      </el-form-item>
      <el-form-item label="-">
        <el-date-picker
          v-model="searchObj.joinDateEnd"
          placeholder="结束时间"
          value-format="yyyy-MM-dd" />
      </el-form-item>

        <el-button type="primary" icon="el-icon-search" @click="fetchData()">查询</el-button>
        <el-button type="default" @click="resetData()">清空</el-button>
    </el-form>
    </el-card>

    <!-- 工具按钮 -->
    <el-card class="operate-container" shadow="never">
      <i class="el-icon-tickets" style="margin-top: 5px"></i>
      <span style="margin-top: 5px">数据列表</span>
      <el-button class="btn-add" @click="add()" style="margin-left: 10px;">添加</el-button>
      <el-button class="btn-add" @click="batchRemove()" >批量删除</el-button>
    </el-card>

    <!-- 表格 -->
    <el-table
    :data="list"
    border
    stripe
    @selection-change="handleSelectionChange">
    <el-table-column type="selection"/>
    <el-table-column
      label="#"
      width="50">
      <template slot-scope="scope">
        {{ (pageNum - 1) * pageSize + scope.$index + 1 }}
      </template>
    </el-table-column>
    <el-table-column prop="name" label="名称" width="80" />
    <el-table-column label="头衔" width="90">
      <template slot-scope="scope">
        <el-tag v-if="scope.row.level === 1" type="success" size="mini">高级讲师</el-tag>
        <el-tag v-if="scope.row.level === 0" size="mini">首席讲师</el-tag>
      </template>
    </el-table-column>
    <el-table-column prop="intro" label="简介" />
    <el-table-column prop="sort" label="排序" width="60" />
    <el-table-column prop="joinDate" label="入驻时间" width="160" />
    <el-table-column label="操作" width="200" align="center">
      <template slot-scope="scope">
      <el-button type="text" size="mini" @click="removeById(scope.row.id)">删除</el-button>
      <router-link :to="'/vod/teacher/edit/'+scope.row.id">
          <el-button type="text" size="mini">修改</el-button>
      </router-link>
      </template>
    </el-table-column>
    </el-table>

    <!-- 分页组件 -->
    <el-pagination
      :current-page="pageNum"
      :total="total"
      :page-size="pageSize"
      :page-sizes="[2, 5, 10, 20, 30, 40, 50, 100]"
      style="padding: 30px 0; text-align: center;"
      layout="total, sizes, prev, pager, next, jumper"
      @size-change="changePageSize"
      @current-change="changeCurrentPage"
    />
  </div>
</template>

<script>
import teacherApi from '@/api/vod/teacher'
export default {
  // 初始值
  data() {
    return {
      list: [], // 讲师列表
      total: 0, // 总记录数
      pageNum: 1, // 页码
      pageSize: 10, // 每页记录数
      searchObj: {}, // 查询条件
      multipleSelection: []// 批量删除选中的记录列表
    }
  },
  created() {
      this.fetchData()
  },
  methods:{
    batchRemove() {
      // 非空判断
      if(this.multipleSelection.length===0) {
        this.$message.warning('请选择要删除的记录！')
        return
      }
      this.$confirm('此操作将永久删除该记录, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        var ids = []
        // 遍历数组
        for(var i=0;i<this.multipleSelection.length;i++) {
          var obj = this.multipleSelection[i]
          var id = obj.id
          ids.push(id)
        }
        return teacherApi.batchRemove(ids)
      }).then((response) => {
        this.fetchData()
        this.$message.success(response.message)
      })
    },
    handleSelectionChange(selection) {
      this.multipleSelection = selection
      console.log(this.multipleSelection)
    },
    add() {
      // 跳转到添加表单
      this.$router.push({path:'/vod/teacher/create'})
    },
    fetchData() {
      // ajax
      teacherApi.pageList(this.pageNum, this.pageSize, this.searchObj)
      .then(response=>{
        this.list = response.data.records
        this.total = response.data.total
      })
    },
    changePageSize(size) {
      this.pageSize = size
      this.fetchData()
    },
    changeCurrentPage(page) {
      this.pageNum = page
      this.fetchData()
    },
    resetData() {
      this.searchObj = {}
      this.fetchData()
    },
    // 讲师删除
    removeById(id) {
      this.$confirm('此操作将永久删除该记录, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        return teacherApi.removeTeacherId(id)
      }).then((response) => {
        this.fetchData()
        this.$message.success(response.message)
      })
    }
  }
}
</script>